Build an iPhone keyboard that looks, sounds and feels like yours. Then let it proofread your paragraphs, learn where your fingers land, and keep a pet on the space bar.
A web sketch of the real thing. The palettes, keycap geometry and the little proofreader are drawn the way the app draws them.
Shortcuts binds the knob, a switch or a held Return to a Shortcut, a snippet with 196 live tokens, a webhook or a link, and types the answer back where you were. Rewind keeps an encrypted, on-device record of what you typed, so a crashed app never loses your words.
NuKey now runs on iPhone Duo’s cover screen and its unfolded inner display. Fold it away or open it up and the keyboard follows the screen you are on.
Start from a ready-made board or build every detail yourself. Underneath, it learns, proofreads and stays out of your way.
Your keycaps stay perfectly still. Underneath, NuKey quietly learns where your fingers naturally land and moves each invisible touch target to meet you. Every key learns, including Space, Shift, Delete and Return.
Pause typing and the companion checks your paragraph with the on-device model. It thinks, fixes, and tells you how many. Tap it to undo.
37 patterns across three channels: background, under keys and legends. Wave, Spectrum, Matrix, Constellation, Aurora, Comet. Or design a motion of your own in Lighting Studio.
Sixteen switches recorded and modelled, from Cherry Reds and Blues to Snow, Jupiter and Aurora. Haptics and sound have their own dials, and the Switch Builder lets you shape pitch, tone and decay.
Cherry, SA or DSA profiles. Chamfered caps, NuBerry caps, Liquid Glass. Print your own artwork on any key, or wrap the whole board in a photo.
Twenty-eight built-in fonts and four hundred more from the Google catalogue, in four weights and seven sizes, nudged exactly where you want them. Legends can light up on their own channel too.
A rotary knob you can colour, mark and light. Turn it to scrub the cursor or change volume. Press it to run an extra. Beside it, a three-way and a two-way toggle switch the number row, the emoji row and the punctuation keys.
Glide across the letters with a trail in your colour. Swipe left across Delete to remove a word at a time, swipe back to restore it.
Fix a word once and NuKey remembers. Suggestions, predictions and the words you actually use.
Type hi and it offers 👋. A dedicated emoji row, skin-tone defaults and a history that follows you.
Switch layouts from a key on the board, with QWERTY, QWERTZ and AZERTY arrangements decoupled from the language.
Search, pin and organise everything you copy, straight from the keyboard.
Save the phrases you type most and drop them in with a tap or a shortcut. “omy” becomes “On my way!”
A bare-bones turbo keyboard built for speed, on its own key in the suggestion bar.
Typing speed over time and a heatmap of where you press. Yours alone, on your phone.
Bind a knob, a switch or a held Return to a Shortcut, a templated snippet, a webhook or a link. How it works →
An encrypted, on-device record of what you typed, put back in a tap when an app loses it. Opt-in, and only ever yours. Read more →
Little features that sit on the keyboard’s surfaces. Turn one on, give it the knob, and it is there whenever the keyboard is.
Four screens, four ways to make a keyboard nobody else has.
Themes
Classic, NuKey, Accents, Graphite, NuChron, Hero and two Liquid Glass boards, each a complete set of keycaps, legends and accents. Classic is free. A theme key on the keyboard cycles the rest without leaving what you’re typing.
Lighting
Under Wave, Under Spectrum, Matrix rain, Constellation, Afterglow, Comet. Reactive flashes under each key as it goes down. Set it separately for light and dark, or build a three-channel rig of your own and share it as a code.
Feel
Reds, Browns, Blues, Blacks, Greens, Clears, Whites, Oranges, then Ink, Cupid, Drift, Snow, Jupiter, Pearl, Aurora and Moss. Haptic and sound strength are independent, and the Switch Builder shapes any of them into something new.
Keys and words
A number row and an emoji row you can turn on. Comma, full stop and apostrophe keys when you want them. A custom layout editor for key height and the gaps between rows, with the geometry shareable as a code.
Every bug and idea sent from inside NuKey is reviewed, and you can watch it move. The last month at a glance, and the full board →
Build a keyboard and start typing without paying anything. NuKey Pro is a single payment that opens the rest. No subscription, ever.
Try everything the builder does before you decide.
Download freeOne payment, yours for good.
Get NuKeyA keyboard is the one thing you touch on every screen. NuKey lets you set how it reads, sounds and moves.
Pick the legend font, weight and size independently of the keycaps, so the letters can be as large and bold as you need.
Every control in the app carries a spoken label, with hints and values where they help, including the companion and the knob.
Turn on Reduce Motion and lighting, the pet and the companion settle into still poses. Lighting can be off entirely.
The app’s own type follows your iOS text size, so the settings you read grow with the rest of your phone.
Haptics and switch sounds have their own strength, and either can go all the way down.
Keycap and legend colours are yours, with a separate set for Dark Mode. Studio flags low-contrast legends before you make a code.
iOS keeps new keyboards behind a couple of settings. Here is the whole path.
Download it from the App Store and open it once, so iOS knows the keyboard is there.
Go to Settings → General → Keyboard → Keyboards → Add New Keyboard… and choose NuKey.
Hold the globe key on any keyboard to pick NuKey, then head back into the app to make it your own.
NuKey does not collect your data. Proofreading runs on the device with Apple Intelligence. Adapt learns on the phone and syncs only privacy-safe aggregates through your private iCloud. Nothing you type leaves. Read the privacy policy.
The companion sits in the suggestion bar. Tap it and NuKey asks the on-device Apple Intelligence model to correct the paragraph before the cursor. Turn on Live proofreading and it checks automatically after you pause. It shows how many fixes it made, and tapping it again undoes them. It needs an iPhone that supports Apple Intelligence.
NuKey learns consistent touch patterns for every key and gradually shifts the invisible target beneath the keycap. Your personal learning stays on the device and can sync as privacy-safe aggregates through your private iCloud account. Typed words and individual touch points are never uploaded.
Yes. Studio builds the whole keyboard in the browser and turns it into a QR code. Scan it with the iPhone Camera and NuKey opens it on the import sheet. The keyboard behind the code is hosted privately and can only be fetched by the genuine NuKey app.
NuKey is free to download and free to try. NuKey Pro is a single £8.99 payment that unlocks the other themes, every switch sound, animated lighting, Keyboard Extras and 31 more keyboard slots. There is no subscription, and the purchase is shared with your family.
Small features that live on the space bar and in the suggestion bar: a pet, a nixie clock, a day-and-night sky, games, a calculator, a unit converter, a bill splitter, snippets, a focus timer, reminders, typing speed and more. They come with Pro and new ones arrive without an app update.
No. NuKey’s App Store privacy disclosure states that the app does not collect data.
Yes. Bind a board control, a switch position or a held Return to any Shortcut, with the selected text or the sentence before the cursor as its input, and NuKey types the answer back the moment you return. Automations can also insert snippets with 196 live tokens, post to a webhook or open a link without leaving the field. The full story →
Rewind keeps a short, encrypted record of what you typed, on the device and only in the keyboard’s private storage, so a crashed app or a reloaded form can be put right in a tap. It is off until you turn it on, skips every password, code and number field, keeps nothing for more than a day, never syncs or uploads, and wipes together with the key that protected it. How Rewind works →
NuKey is designed for iPhone, including iPhone Duo on both its cover screen and its unfolded display, and requires iOS 26.2 or later. Proofreading needs Apple Intelligence; everything else works on any supported iPhone.
Ready when you are